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Finding the Fourth Proportional to 220,836.80, 331,255.20 and 54,624.80

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Solution

The fourth proportional to 220,836.80, 331,255.20 and 54,624.80 is: 81,937.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,836.80 : 331,255.20 = 54,624.80 : x
  2. Step 2: Convert to fraction form
    220,836.80/331,255.20 = 54,624.80/x
  3. Step 3: Cross multiply
    220,836.80x = 331,255.20 × 54,624.80
  4. Step 4: Simplify right side
    220,836.80x = 18,094,749,048.96
  5. Step 5: Solve for x
    x = 18,094,749,048.96/220,836.80
  6. Step 6: Final answer
    x = 81,937.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.